Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Exit and Termination Costs - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring Charges	$ 10,297		$ 2,206	$ 11,892	$ 2,206
Severance costs	$ (148)		2,180	1,447	$ 2,180
Workforce Reduction
Restructuring Cost And Reserve [Line Items]
Severance costs			$ 2,200
Northwest Pennsylvania
Restructuring Cost And Reserve [Line Items]
Restructuring Charges				$ 10,400
Severance costs		$ 1,600